As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT DEPARTED, AT THE BEGINNING OF DECENT, THE CREW EXPERIENCED AN ODOR AND HAZE IN THE COCKPIT. WENT THROUGH THE CHECKLIST AND REDUCED THE TEMPERATURE SETTING IN THE AIRCRAFT. THE SITUATION IMPROVED. BEFORE LANDING, THE CREW DECLARED AN EMERGENCY. THE AIRCRAFT LANDED WITHOUT FURTHER EVENT. OPEN